Question # 1

In P-type semi -conductior, most of the current is due to.

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Free electron

Holes

Positive ions

Heat

The county which launched its first artificial satellite into space:

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France

British

America

Russia

Sunlight is directly transformed to electricity with the help of:

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Solar cells

Diod

Rectifier

Transistor

----------------- rays are used to detect the flaws and crocks of metal parts.

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a -rays

gama rays

beta rays

None of these

The country, whihc launched its artificial satellite into space for the first time is.

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America

France

Russia

Pakistan

Space station that looks like a shining planet in space is.

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Metostat

Cyclone

Mir

Both a and b

The solar energy falling on the atmosphere of Earth is almost:

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1.2 Kilowatt per square meter

1.4 kilowatt per square meter

1.6 kilowatt per square meter

1.8 kilowatt per square meter

One thouseand watt power is called.

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One mega watt

One giga watt

One hector watt

One kilowatt

Prodcut of forces and distance is called.

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Work

Energy

Power

Heat

The potential difference between tow paints in a circuit is measured by:

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Galvanometer

Ammeter

Voltmeter

Multi - meter

The numebr (100)16 in decimal is equal to............. in binary.

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1110100

01011101

1100100

1001001

V_s / V_{p is equal to.}

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Vp / Vs

Np / Ns

Ns / Np

None

---------------- lasers are presently used for operating cataract and glaucoma.

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Argon

Neon

Helium

Hydrogen

The principal of light on whihc the fibre optics works is.

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Reflection

Refraction

Total internal reflection

Dispersion

Electric signal is converted into digital signal by.

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Key board

Monitor

Scanner

Modem

Ammeter is used to.

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Measure the current

Detect the current

Measrue the voltage

None of them

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